WO2001007373A1 - Plaque de verre cintree pour vitres d'automobiles - Google Patents

Plaque de verre cintree pour vitres d'automobiles Download PDF

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Publication number
WO2001007373A1
WO2001007373A1 PCT/JP2000/003626 JP0003626W WO0107373A1 WO 2001007373 A1 WO2001007373 A1 WO 2001007373A1 JP 0003626 W JP0003626 W JP 0003626W WO 0107373 A1 WO0107373 A1 WO 0107373A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass sheet
curvature
bent
glass plate
bending
Prior art date
Application number
PCT/JP2000/003626
Other languages
English (en)
Japanese (ja)
Inventor
Hideo Yoshizawa
Original Assignee
Nippon Sheet Glass Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Sheet Glass Co., Ltd. filed Critical Nippon Sheet Glass Co., Ltd.
Priority to US10/031,958 priority Critical patent/US6749926B1/en
Priority to AU51050/00A priority patent/AU5105000A/en
Priority to JP2001512465A priority patent/JP4087111B2/ja
Priority to EP00935540A priority patent/EP1209130A4/fr
Publication of WO2001007373A1 publication Critical patent/WO2001007373A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/0305—Press-bending accelerated by applying mechanical forces, e.g. inertia, weights or local forces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/008—Windows; Windscreens; Accessories therefor of special shape, e.g. beveled edges, holes for attachment, bent windows, peculiar curvatures such as when being integrally formed with roof, door, etc.
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B60J1/08—Windows; Windscreens; Accessories therefor arranged at vehicle sides
    • B60J1/12—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable
    • B60J1/16—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable slidable
    • B60J1/17—Windows; Windscreens; Accessories therefor arranged at vehicle sides adjustable slidable vertically
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • C03B23/033—Re-forming glass sheets by bending by press-bending between shaping moulds in a continuous way, e.g. roll forming, or press-roll bending
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B35/00—Transporting of glass products during their manufacture, e.g. hot glass lenses, prisms
    • C03B35/14—Transporting hot glass sheets or ribbons, e.g. by heat-resistant conveyor belts or bands
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24628—Nonplanar uniform thickness material
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree

Definitions

  • the present invention relates to a bent glass sheet suitable for a vehicle window, particularly a vehicle window provided with a mechanism for moving a glass sheet along a surface direction.
  • the surface of such a bent glass sheet is required to be bent with high precision along a predetermined curved surface. This is because if there is a point on the surface where the curvature fluctuates, the reflection image of the glass surface around the point will be distorted. In particular, there is a strong demand for the removal of distortion in reflected images from glass windows that form part of the sidelines of automobiles.
  • the bent glass sheet used for the back window etc. is not bent to have a certain curvature. For this reason, even if an area having a curvature different from the predetermined curvature is locally present, its influence is difficult to visually recognize.
  • a very natural reflection image can be obtained as a whole from a glass plate that is curved so as to have the same curvature in two directions, respectively. Variations and defects in the partial curvature of the surface are rather conspicuous.
  • the glass plate When used for door windows, it is desirable to slide the glass plate while keeping the position of the glass plate at the upper end opening (slit) of the door body as constant as possible. Increasing the width of the slits in consideration of the margin makes it easier for rainwater and dust to enter the door compartment.
  • the slit is provided with a weather strip to prevent foreign matter from entering, but if the position of the glass plate is too uneven, the friction between the weather strip and the window glass becomes excessive, or the weather strip and the glass plate There will be a gap between them.
  • a typical method for bending a glass sheet is press molding using a mold.
  • This method is suitable as a method for mass-producing bent glass sheets having complicated shapes used for back windows of automobiles and the like.
  • the glass plate 503 supported by the ring mold 501 and pressed in a state of being sucked by the molding mold 502 has a central part before being cooled. 504 hangs down slightly (Fig. 33B). If the deformation due to gravity can be expected, it may be possible to fine-tune the shape of the mold. However, it is almost impossible to accurately predict the amount of deformation because the factors that determine the amount of deformation are various.
  • a method has also been proposed in which a glass plate is heated while being conveyed by a roller and bent along the shape of the roller (US Pat. No. 4,123,246, JP-A-3-174333). No. 4).
  • the sheet is bent using rollers arranged above and below the glass sheet conveyance path, the glass sheet will be bent intermittently. In other words, particularly in the initial stage of bending, the glass sheet is locally bent while being stretched between a pair of rollers.
  • it is necessary to bend and arrange the rollers, but all the rollers arranged along the transport direction are bent precisely and this state is maintained. It is actually difficult to rotate while rotating.
  • the method of bending while being pinched by a roller is excellent in mass productivity, but is not sufficient in terms of processing accuracy.
  • the glass sheet is transported while supporting it by blowing up the gas from the hearth bed arranged below, and the glass sheet is heated by the gas of the brackets, and is shaped according to the shape of the hearth bed by its own weight.
  • a method has also been proposed (Japanese Unexamined Patent Publication No. Hei 5-93037). By using this method, it is possible to avoid “bending” by the roller and the occurrence of defects due to contact with the roller.
  • Japanese Unexamined Patent Publication No. Hei 5-93037 Japanese Unexamined Patent Publication No. Hei 5-93037
  • the method of bending while blowing and transporting gas is suitable for forming simpler shapes, but when manufacturing a glass plate with “two-way” bending, the processing accuracy must be sacrificed. I could't get it.
  • the conventional bending method does not consider cooling (rapid cooling or slow cooling) the glass sheet while maintaining its shape accurately after bending, and does not disclose any ideas for that. .
  • the inventor first tried to improve the bending process.
  • a mold bending member
  • the glass plate is lifted using a mold such as a ring mold or the glass plate is hung using a tongue in order to press the glass plate into this mold, as described above, Will be transformed.
  • the bent glass sheet of the present invention is not limited to a sheet manufactured using a belt, but uses a belt having excellent followability to the surface of a glass sheet, and has a shape of a conveyance path even during cooling. Manufacturing is possible for the first time by imitating the bent shape of the glass plate.
  • the bent glass sheet for a vehicle window of the present invention has the following shape.
  • the bent glass sheet of the present invention has a substantially constant thickness and a curved main surface. All points on this surface have the maximum curvature in the direction of one of the tangent vectors (first tangent vector) of the two tangent vectors that are tangent to the surface and are orthogonal to each other, and the other tangent vector (first 2 has the minimum curvature in the direction. Further, the bent glass sheet of the present invention has a feature that the maximum curvature is substantially the same in all of the above points. In addition, the curvature at all points on a curve formed by intersecting the plane including the normal vector at one point on the curved surface and the tangent vector at which the maximum curvature is obtained is the maximum curvature.
  • the minimum curvature is not 0 (in other words, not a cylindrical shape), and is not the same as the maximum curvature (in other words, it is not a sphere).
  • the radius of curvature of the above curve is preferably at least 500 mm and less than 500 mm.
  • the main surface refers to the surface of a pair of front and back glass plates excluding the end surface of the glass plate.
  • the end surface of the glass plate also includes a processed surface (polished surface) formed by grinding the peripheral end of the glass plate (in other words, the main surface does not include the polished surface).
  • the bent glass sheet according to the present invention includes a flat surface including a normal vector and a tangent vector at which the minimum curvature is obtained at one point on the curved surface, and all points on a curve formed by intersecting the curved surface. Is preferably substantially the same as the minimum curvature.
  • the radius of curvature of this curve is preferably 500 mm or more and 500 mm or less.
  • the bent glass sheet of the present invention is a tempered glass sheet reinforced by quenching after heating.
  • the thickness of the bent glass plate is not particularly limited, but is preferably 2.3 mm or more and 5.0 mm or less.
  • FIG. 1 is a diagram for explaining the shape of one embodiment of the bent glass sheet of the present invention.
  • FIG. 2 is a perspective view showing a wooden mold for examining the processing accuracy of one mode of the bent glass sheet of the present invention.
  • FIG. 3 is a diagram for explaining the shape of one embodiment of the bent glass sheet of the present invention from another viewpoint.
  • FIG. 4 is a view for explaining the shape of another embodiment of the bent glass sheet of the present invention.
  • FIG. 5 is a diagram for explaining an example of processing a bent glass sheet according to the present invention.
  • FIG. 6 is a partial perspective view of an automobile showing an example of an automobile glass window using the bent glass plate of the present invention.
  • FIG. 7 is a plan view of an automobile showing another example of an automobile glass window using the bent glass sheet of the present invention.
  • FIG. 8 is a partial plan view of a slit of a door using the bent glass plate of the present invention.
  • FIG. 9 is a partial cross-sectional view showing a sealing state by a weather strip in a slit of a door using the bent glass plate of the present invention.
  • FIG. 10 is a cross-sectional view showing one embodiment of an apparatus for manufacturing a bent glass sheet of the present invention.
  • FIG. 11 is a cross-sectional view showing the vicinity of a bending region of the device shown in FIG.
  • FIG. 12 is a perspective view showing one embodiment of a mold used for manufacturing a bent glass sheet of the present invention.
  • FIG. 13 is a cross-sectional view showing the shape of the molding die shown in FIG. 12.
  • FIG. 13A, FIG. 13B, and FIG. It is sectional drawing, BB sectional drawing and CC sectional drawing.
  • FIG. 14A is a cross-sectional view showing another embodiment of a forming die used for manufacturing the bent glass sheet of the present invention, and FIG. 14B is formed using the forming die shown in FIG. 14A. It is sectional drawing of the bent glass plate.
  • FIG. 15 is a cross-sectional view showing one embodiment of a forming apparatus (forming section) used for manufacturing a bent glass sheet of the present invention, which is cut in a direction crossing the glass transport path.
  • a forming apparatus forming section
  • FIG. 16 is a partially enlarged view showing a part of the device shown in FIG. 15 in an enlarged manner.
  • FIG. 17 is a partial perspective view showing one embodiment of a pressing roll used for manufacturing the bent glass sheet of the present invention.
  • FIG. 18 is a cross-sectional view showing an example of a forming apparatus (forming section) using the pressing roll used in FIG.
  • FIG. 19 is a perspective view showing the relationship between the shape of the bent glass sheet of the present invention and the forming surface.
  • FIG. 20 is a perspective view showing one embodiment of the bent glass plate of the present invention.
  • FIG. 21 is a cross-sectional view showing the vicinity of a bending area of another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • FIG. 22 is a cross-sectional view showing the vicinity of a bending area of still another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • FIG. 23 is a cross-sectional view showing another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • FIG. 24 is a cross-sectional view showing the vicinity of the bending region of the device shown in FIG.
  • FIG. 25 is a cross-sectional view showing a state where the glass plate is bent in the bending region shown in FIG.
  • FIG. 26 is a cross-sectional view showing a state after the glass plate is bent in the bending region shown in FIG. 24 and before the glass plate is transferred to the quenching device.
  • FIG. 27 is a cross-sectional view showing a state where the glass plate is bent and then conveyed to the quenching device after being bent in the bending region shown in FIG.
  • FIG. 28 is a cross-sectional view showing the vicinity of a bending region of still another mode of the apparatus for manufacturing a bent glass sheet of the present invention.
  • FIG. 29 is a cross-sectional view showing a state after bending the glass plate in the bending region shown in FIG.
  • FIG. 30 is a cross-sectional view showing still another embodiment of the bent glass sheet manufacturing apparatus of the present invention.
  • FIG. 31 is a cross-sectional view showing a state after the glass plate is bent in the bending region shown in FIG. 30 and before the glass plate is transported to the quenching device.
  • FIG. 32 is a plan view of a conventional door slit in which a bent glass plate is fitted and bent in the vehicle length direction.
  • FIG. 33 is a view for explaining deformation of a glass sheet in a conventional method of bending a glass sheet.
  • FIG. 33A shows a state during forming
  • FIG. 33B shows a state after the forming.
  • a form G of the bent glass sheet of the present invention shown in FIG. 1 has main surfaces S 2 parallel to each other.
  • Taking the main surface S E, taken by the plane S n draw curve c.
  • k be the curvature at the point P of the curve c.
  • the unit tangent base transfected Le x 2 curvature k is base unit tangent reaches the maximum value k vector X i and curvature becomes the minimum value k 2, orthogonal (Euler's theorem to each other; According to the theorem, X
  • the angle formed between the two and ⁇ is ⁇ , and k-k iCos 2 ⁇ ! ⁇ ⁇ !! 2 ⁇ ).
  • the curvature k 2 corresponds to the principal curvature
  • the unit tangent vector X 2 corresponds to the principal curvature direction.
  • the main surface S 2 is along connection slides in-plane direction.
  • the bent glass sheet G is curved, for example, to open and close windows. You may slide along the guide rail arrange
  • the minimum curvature is not 0 regardless of the position of point P. That is, it is bent in “two directions” at every point. Therefore, it is neither a cylindrical shape nor a ring-shaped curved surface like a donut. Also, regardless of the position of point P, the minimum curvature is not the same as the maximum curvature. That is, it does not have a point where the curvature in all directions is the same (umbilical point). Therefore, it is neither spherical nor elliptical.
  • the bent glass plate is also characterized in that it is accurately bent to the above shape.
  • the accuracy of the bent shape can be inspected using, for example, a wooden mold shown in FIG.
  • This wooden mold was manufactured as a bending glass plate inspection table when the minimum curvature k 2 also matched on the main surface S i irrespective of the position of the point P, and the surface was described above. It was manufactured using NC routers to exactly meet the conditions. Regarding this surface, whether the surface is scanned along the longitudinal direction 44 or the surface along the transverse direction 45, the resulting curve has a predetermined curvature at all points.
  • a wooden mold was prepared in which the radius of curvature of the curve in the longitudinal direction 44 was 1500 mm and the radius of curvature of the curve in the transverse direction 45 was 130 mm. Then, when a bent tempered glass sheet (size: about 900 mm X about 500 mm) formed by the press forming method using the ring mold described above with the above-mentioned respective radii of curvature as a target was placed thereon, Although the periphery of the main surface was along the surface of the wooden mold, the center of the main surface was raised up to about 3 mm.
  • the gap between the main surface and the target curved surface (the surface of the wooden mold) was so small that it could not be measured, or was less than 1.5 mm even if it could be measured.
  • the bent glass sheet of the present invention has a gap between the target curved surface of 1.5 mm or less, and preferably 1.0 mm or less, and has a main surface "substantially" along the target curved surface. This shall include glass plates.
  • a wooden mold whose surface is ground in a predetermined shape as described above is used, the processing accuracy of the bent glass sheet can be easily inspected.
  • a plurality of dial gauges may be provided along a direction perpendicular to the direction of the maximum curvature of the surface of the wooden mold. Then, by sliding the bent glass sheet on the wooden mold in the direction of the maximum curvature, the gap can be measured over the entire area of the surface of the bent glass sheet.
  • the bent glass plate was not only in the longitudinal direction 4 4 and in the transverse direction 4 5, In all directions, including the diagonal direction 46, the main surface could be translated while maintaining the state along the wooden surface 43 (that is, without separating the surfaces from each other).
  • the main surface of the glass plate remains in contact with the surface of the wooden mold. Had been maintained.
  • the main surface of the bent glass sheet deviated from the wooden surface 43.
  • the bent glass sheet can be moved while maintaining the state where the main surface of the glass sheet exists on the curved surface including the main surface. did it.
  • the direction of raising and lowering the bent glass sheet also depends on the shape of the glass window, etc. It can be in any one direction. Regardless of the vertical direction, it is sufficient for the guide rails provided inside the door of the vehicle to have a simple shape that draws an arc in a predetermined plane. Although it is mathematically grounded to be able to select the elevation direction arbitrarily, no application to glass windows has been attempted so far.
  • the bent glass plate of the present invention basically has a continuous and smooth main surface and is bent at a constant curvature in at least one direction, so that an extremely excellent reflected image can be provided.
  • bent glass sheet will be described in further detail based on another aspect of the bent glass sheet of the present invention.
  • the bent glass sheet of the present invention realizes opening and closing of windows by simple movement in any direction.
  • the bent glass sheet of the present invention can also be expressed as follows. That is, the bent glass plate of the present invention has a substantially constant thickness and a curved main surface, and the main surface is present on a predetermined plane and is convex on one side. It is a part of a curved surface obtained by translating out of plane.
  • the first curve is defined as a second curve in which the trajectories of all points constituting the curve have a predetermined radius of curvature, are substantially parallel to each other, and have the same length. Will be moved so as to form a set.
  • a convex curve on the other hand can be understood as a curve in which there is no inflection point (a point changing from an upward convex to a downward convex or vice versa) on the curve.
  • the parallel movement refers to a movement in which the line segment to be moved is parallel to the line segment before the movement at all times during the movement and after the movement.
  • the first curve may be determined so as to conform to the shape of the slit at the upper end of the door storage part. . That is, the first curve is roughly determined along the vehicle body line.
  • the bent glass plate with the first curve along the slit in this way Can be moved up and down smoothly by moving along the second curve of the bent glass sheet. If the bent glass sheet is raised and lowered in this way, the first curve appears along the slit at the top of the door storage unit at all stages during the raising and lowering, despite the use of a simple mechanism. Become.
  • the width of the slit at the upper end of the door storage unit is approximately the same as when a cylindrical or flat glass plate is used.
  • the design of the vehicle glass window is not excessively limited as in the case of using a cylindrical or flat glass plate.
  • the main surface 9 of the bent glass plate can be described as a surface obtained by cutting a part of the predetermined curved surface 1.
  • This curved surface 1 can be grasped as a surface drawn by the curve 4a when the arc-shaped curve 4a existing in the plane 3 is translated in accordance with a certain rule.
  • the rule is that each point P 1 ( Q,, on the curve 4a is moved by the same distance, and the locus 5a, 5b, 5c drawn by each point P Q1 ; Is moved so as to form an arc having the same radius of curvature and the same shape, and the movement of the point P 1 Q 1 ( R, is represented by the points P 2 , Q 2 , R, respectively.
  • curve 4a rises from plane 3 and reaches curve 4c via curve 4b.
  • curve 4a, curve 4b and curve 4c Have the same shape and are parallel to each other.
  • a part of the curved surface 1 defined in this manner becomes the main surface 9 of the bent glass sheet.
  • the bent glass sheet actually has another main surface having the same shape, apart from the main surface 9 described above.
  • the pair of main surfaces are arranged in parallel with each other at a distance corresponding to the thickness of the glass plate, and one can be seen as a convex surface and the other as a concave surface in appearance.
  • the bent glass sheet having such a main surface is suitably used, for example, for a window of an automobile door.
  • the illustration of the door is omitted in FIG. 3, the portion below the plane 3 is omitted.
  • curve 4a is the main surface of the glass plate that appears at the upper end (slit) of the door storage section, it is easy to understand that the bent glass sheet descends to the door storage section. it can. That is, by bending each point on the main surface 9 by the same distance along the trajectories 5a, 5b, and 5c in a direction opposite to the above-described direction (downward in FIG. 3), The glass plate is stored inside the door.
  • the point P 3 reaches the point Pi via the point P 2 , and is further drawn downward from the plane 3. Elevation of such a bent glass sheet does not require adjustment of the elevating ratio of the glass sheet or complicated guide rails, and is simple and highly reliable for elevating flat and cylindrical window glasses. A mechanism is sufficient. However, the slit need not have a shape existing in the plane.
  • the direction in which the window glass is raised and lowered is defined by the trajectories 5a, 5b, and 5c.
  • the trajectories 5a, 5b, and 5c are not limited to the shapes shown in FIG. 3 as long as they have a radius of curvature (preferably 500 mm or more) that is parallel to each other and applicable to elevating the glass plate.
  • the upper limit of the radius of curvature is not particularly limited, but is preferably, for example, less than 5000 mm.
  • the angle at which the plane 3 intersects with the planes including the trajectories 5a, 5b, and 5c is, for example, a right angle, but is not particularly limited, and may be determined so as to conform to the design of the vehicle.
  • the shape of the curved line 4a may be appropriately determined so as to conform to the shape of the door of the automobile.
  • FIG. 4 shows another embodiment of the bent glass sheet of the present invention.
  • the main surface 19 of the bent glass plate can also be described as a surface obtained by cutting a part of the predetermined curved surface 11.
  • the main surface 19 moves the curve 14a, the points S T on the curve 14a substantially parallel and the same distance, and moves the points S 2 , T 2 , U point S 3 through 2, T 3, point leading to U 3 T 1;
  • locus 15 a, 15 b, 15 c is arc having substantially the same radius of curvature substantially the same shape (second When it is moved so that, it can be grasped as a surface drawn by the curve 14a.
  • the curves 14a, 14b, 14c are parallel to each other, but furthermore, Each is a curve having a predetermined radius of curvature, that is, an arc.
  • the radius of curvature is set to the radius of curvature of the second curve (preferably 500 mm or more and 500 mm or more). (Less than), more specifically, more preferably 5,000 mm or more and 50,000 mm or less.
  • the glass sheet formed into the shape shown in Fig. 4 and bent so that the first curve and the second curve are orthogonal to each other has the same radius of curvature, the wooden form shown in Fig. 2 It can be in close contact with the surface of 1.
  • bent glass sheet of the present invention described above has an advantage that higher rigidity can be obtained in the direction perpendicular to the plane than a flat or cylindrical glass sheet having the same thickness.
  • the bent glass sheet of the present invention is smoothly bent in two directions, the amount of bending of the glass sheet itself due to wind pressure or the like can be reduced. In other words, the thickness of the glass plate required to obtain the predetermined rigidity may be small. Therefore, it is possible to reduce the weight of the vehicle by making the glass plate thinner.
  • the bent glass plate 31 may be appropriately processed such as forming a through hole 32 in order to connect to the elevating mechanism.
  • Glass plates belonging to the present invention are arranged in the glass windows 33a and 33b of the front door 35a and the rear door 35b of the automobile illustrated in FIG.
  • the glass window 33a of the front door rises and descends substantially along the pillar 34
  • the glass window 33b of the rear door rises and descends in a direction substantially perpendicular to the vehicle length direction.
  • Windows When closed both glass windows form a curve along the vehicle's sideline that extends along the length of the vehicle. Is also secured.
  • the reflected image can be observed as a continuous image even in the area near both glass windows. Even if the glass windows are made narrower so that both glass windows are close to each other, there is no discontinuity in the reflected image, so there is no unnatural appearance.
  • the bent glass sheet of the present invention is used for the glass windows 53a, 53b, 53c on the side of the vehicle body. These glass windows are arranged so as to have, when viewed from above, a curve having substantially the same radius of curvature as the curve drawn by the outer edge of the vehicle body.
  • the front door window 53a and the rear door window 53b are openable and closable glass windows, but a glass plate is fixed to the glass window 53c (rear quarter) behind the side.
  • the bent glass sheet of the present invention is not limited to the window that is opened and closed by sliding upward from the door storage section, but includes a window to which the glass sheet is fixed, and a pulling using a plurality of glass sheets.
  • FIG. 8 shows a view of one embodiment of the door using the bent glass plate of the present invention, as viewed from the upper end (slit) side.
  • the bent glass plate 73 of the present invention By using the bent glass plate 73 of the present invention, the curve drawn by the slit 72 of the automobile door in the vehicle length direction can be matched with the curve drawn by the glass plate 73 in the same direction. Therefore, the distance between the glass plate 73 and the main body is kept constant, and the sealing of the slit by the weather strip 74 is kept well (FIG. 9). As described above, since the position of the glass plate 73 appearing in the slit 72 is constant regardless of the elevating state of the glass plate, the sealing of the slit is always well maintained.
  • a gap 85 is formed between the weather strip 84 and the glass plate 83 as shown in FIG. Further, in a region where the weather strip 84 is too close to the vehicle body, the weather strip 84 is strongly pressed against the glass plate, and the friction when the glass plate moves up and down increases.
  • bent glass sheet of the present invention is particularly suitable as a glass sheet for a vehicle door.
  • FIG. 10 is a cross-sectional view showing one embodiment of an apparatus for producing a bent glass sheet of the present invention.
  • this manufacturing apparatus includes a heating furnace 101, a bending apparatus 102, and a quenching apparatus (cooling apparatus) 103, which share a continuous glass plate transport path 141.
  • This glass sheet transport path 141 is substantially horizontal in the heating furnace 101, and gradually deviates upward from the horizontal direction in the bending device 102, so that the quenching device 100 In No. 3, it has a predetermined curvature.
  • FIG. 11 is an enlarged view of the vicinity of a bending region of the device shown in FIG. As shown in FIG.
  • a pressing roll (press roll) 107 below the conveying path 141 is formed by a bending member 100 above the conveying path 141.
  • a heat-resistant belt 105 is provided on the transport path 141 in the bending area so that the belt can travel between the bending member 106 and the transport path 141.
  • the belt 105 is suspended in a loop by a roll and a bending member, and forms an endless track.
  • the rolls include a drive roll 15 1 and a tension roll 15 2.
  • a drive device (not shown) is connected to the drive roll 15 1.
  • the tension of the belt 105 can be maintained in an appropriate state by adjusting the position of the tension roll 1502.
  • Belt temperature controllers 153 are arranged on both sides of a part of the endless track. Belt 105 temperature Can be adjusted by heating or cooling the belt 105 with the belt temperature controller 153.
  • the belt 105 is made of, for example, heat-resistant fibers such as metal fibers, inorganic fibers, graphite fibers, and aramide fibers.
  • the belt 105 can be obtained by plain weaving, twill weaving, or knitting of such a heat-resistant fiber.
  • the belt 105 may be formed by forming a heat-resistant material into a felt or a net shape.
  • the belt 105 preferably has a width sufficient to cover the entire width of the glass conveying path 141.
  • a part of the surface of the bending member 106 is in contact with the endless track drawn by the belt 105, and a part of the surface is in contact with the transport path 141.
  • the surface of the bending member 106 facing the transport path 144 functions as a surface for bending the glass plate. This surface has a shape that is convex in the transport direction of the glass plate.
  • Various metals and ceramics can be used as the material of the bending member.
  • the bending member 106 may be an integral body as shown in FIG. 11, or may be configured by combining a plurality of divided members.
  • FIG. 12 is a perspective view of the forming surface 2661 of the bending member 106 as viewed from below the conveying path.
  • 13A to 13C show a cross-sectional view taken along line AA, a line B-B, and a cross-sectional view taken along line C-C of the bending member 106 in FIG. 12, respectively.
  • the forming surface 261 is flat near the contact start line 262 where the glass sheet first contacts the bending member 106 (Fig. 13A :).
  • the forming surface 26 1 gradually bends as it progresses down the glass transport path 14 1 to the downstream side of the transport (Fig.
  • the bent shape for example, may be a bent shape having a predetermined radius of curvature R 2, also for example, sea urchin I shown in FIG. 1 4 A, it may be arcuate shape deepest eccentric.
  • the bent glass plate 2261a shown in FIG. 14B is obtained from the forming surface 261 shown in FIG. 14A.
  • the forming surface 261 is parallel to the direction in which the glass sheet is unloaded from the heating furnace (horizontal direction) near the contact start line in the glass sheet transport direction. However, it gradually deviates upward from the horizontal as it moves downstream (Fig.
  • the molding surface 261 has a radius of curvature substantially equal to the radius of curvature of the glass transport path 141 in the quenching device at least near the contact end line. It is preferable to attach a heater to the bending member 106. This is to prevent the glass sheet from being affected by the bending member 106 whose temperature has not yet sufficiently increased in the initial stage of the serial production.
  • a press roll 107 is provided along the lower side of the transport path 141.
  • the pressing roll 107 functions as a glass plate pressing member that presses the glass plate of the transport path 141 onto the bending member 106.
  • the pressing roll 107 is connected to a position adjusting mechanism so that the pressing pressure against the bending member 106 can be controlled.
  • the surface of the pressing roll 107 is made of a heat-resistant material like the belt 105. This surface is preferably formed of a material having a cushioning effect on the glass plate, such as felt.
  • the pressing roll 107 is connected to a driving means (not shown) so as to be driven at a peripheral speed required for conveying the glass plate.
  • the present invention is not limited to this, and a non-driven roll (free roll) that can rotate with a small external force may be used.
  • free rolls it is preferable that each roll 7 can rotate independently.
  • the number of pressing rolls 107 is appropriately determined according to the desired bending shape of the glass plate, but generally, at least two are required. The preferred number of rolls is 5 or more.
  • each pressing roll for example, an integrated body in which a support member for supporting a glass plate is attached to one rod made of an elastic body can be used.
  • the support member for example, a plurality of disks or a cylindrical flexible sleeve can be used.
  • the direction perpendicular to the glass sheet conveyance direction A plurality of rolls divided in the width direction of the metal plate may be used.
  • FIG. 15 is a cross-sectional view illustrating a bending apparatus when a plurality of rolls are used as pressing rolls, which is drawn from the heating furnace side.
  • the pressing rolls 274a, 274b, 274c , shown in FIG. 15 are attached to the tips of the rods 275a, 275b ,,,.
  • Each of the rods 275a, 275b, is inserted through the base member 279 so as to be able to move up and down.
  • Each rod 275a, 275b is biased upward by a spring 276a, 276b ,, whose lower end is regulated by a base member 279, so that each roll 274a, 274 b, 274 c ,,, press the heat-resistant belt 105 (the glass plate and the heat-resistant belt when the glass plate passes) against the mold 106.
  • Fig. 16 shows an enlarged view of the area around the pressing roll 274b.
  • the pressing roll 274b is attached to a shaft 278b rotatably supported on a base 277b.
  • the pedestal 277b is attached to the tip of the rod 275b so as to be tiltable in the width direction of the glass plate.
  • a plurality of free rolls 274a, 274b, 274c,, arranged in the width direction of the glass plate 104 are used as members for pressing the glass plate 104 together with the belt 105 against the molding die 106, and these rolls are used. If each roll can be tilted in the width direction of the glass plate and the individual rolls are urged toward the forming die, each part of the surface of the glass plate can be reliably pressed against the forming die.
  • FIGS. 17 and 18 show examples of one-piece pressing rolls.
  • the roll 265 includes a bendable core 266 made of an elastic body, a rod 267 made of an elastic body disposed around the core 266, and a core 266.
  • both ends of the roll 265 are rotatably supported by a support member 264 provided with a height adjusting mechanism, so that the surface of the glass plate is securely formed on the forming die. Can be pressed against.
  • the glass sheet transport path 141 advances between the bending member 106 and the pressing roll 107 along the belt 105.
  • the transport path 141 in the bending area is substantially horizontal on the upstream side of the transport near the outlet 112 of the heating furnace. Then, as the transport path proceeds downstream, the transport path 141 gradually turns upward and gradually deviates from the horizontal orbit on the upstream side of the transport. Conversely, the transport path 141 may be formed so as to gradually move downward from the horizontal direction.
  • the transport path 141 typically has a continuously changing curvature.
  • the conveyance path 1 41 in the immediate vicinity of the quenching device 103 is set to have a substantially constant curvature when viewed from the side of the quenching device. It is also applied continuously to the transport path.
  • the glass conveying means in the heating furnace 101 is not particularly limited, but a roll 111 is preferable from the viewpoint of heating efficiency.
  • the quenching device 103 is preferably provided in such a manner that the cooled glass is blown by a cooling air blowing nozzle (not shown) while the bent glass sheet is conveyed through a conveyance path having a constant curvature, thereby rapidly cooling the glass sheet.
  • the bent glass sheet is quenched, but may be gradually cooled (annealed) in the transport path.
  • a converter for changing the transport direction of the glass plate to another direction such as a horizontal direction may be provided further downstream of the quenching device 103.
  • the heated glass plate may be deformed.
  • the glass sheet is cooled down to a temperature at which no deformation occurs while passing through a conveyance path having the same curvature as the bent glass sheet.
  • the glass plate 104 the tip of which has reached the forming part, is sandwiched between the first pressing roll 171, located on the most upstream side, and the bending member 106, and the roll 1701, It is pressed against the bending member 106 via the belt 105. Since the surface of the pressing roll 107 is formed of a heat-resistant felt material, the pressing roll 107 is deformed so as to maintain the contact area at or above a predetermined value.
  • the belt 105 composed of a belt cloth using stainless steel fiber travels at a constant speed to the downstream side in the glass sheet transport direction while sliding on the forming surface of the bending member 106, and the glass sheet 105 4 is guided to the downstream side of conveyance. Then, as shown in FIG. 11, the tip is brought into contact with the second pressing roll 72.
  • the traveling speed of the belt 5 is preferably selected from the range of 80 mmZ seconds to 400 mmZ seconds. At this stage, since the glass plate 104 has not been subjected to secondary molding yet, it is substantially flat.
  • the glass plate is further transported to the downstream side of the transport.
  • the second pressing roll 17 2 presses the glass plate 104 against the bending member 106 while slightly lifting the tip of the glass plate upward.
  • the bending surface of the bending member 106 is slightly receded upward, so that bending of the glass plate 104 starts from this stage.
  • the entire upper surface of the glass plate 104 being pushed upward by the pressing rolls 107 is in contact with the belt 105, so that the glass plate 104 maintains a stable posture. Conveyed. Since it is conveyed while maintaining a stable posture and is formed continuously rather than intermittently, there is almost no irregularity on the surface of the glass plate.
  • Fig. 19 shows the glass plate before and after bending, together with the forming surface 261.
  • the flat glass plate 104 reflects the shape of the molding surface 261, and the glass plate is provided with, for example, a radius of curvature of 1 ⁇ in the conveying direction, and in the width direction of the glass plate. for the glass plate 2 4 4 bending example the radius of curvature R 2 is granted.
  • FIG. 20 is a perspective view of a glass plate formed by using the forming surface 2661 shown in FIG.
  • the glass plate 104 is bent into a predetermined shape while passing through the bending area, and then is conveyed to the quenching device through the slit of the partition plate 132. In the quenching device, the glass plate 104 is conveyed at a constant speed by the conveying rolls 131, and is blown with cooling air to be rapidly cooled for strengthening.
  • a bending-strengthened glass sheet is manufactured.
  • FIG. 21 is a sectional view showing the vicinity of a bending region of another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • This device has the same configuration as the device shown in FIG. 11 except for the part that presses the glass plate upward.
  • the pressing port below the glass transport path 14 1 A second belt 109 is present on the belt 108.
  • the pressing roll 108 presses the glass plate 104 against the bent member 106 via the first belt 1 ⁇ 5 and the second belt 109.
  • the second belt 109 is, like the first belt 105, suspended in a loop around a roll including a driving roll 1911 and a tension roll 1992, thereby forming an endless track.
  • a drive (not shown) is connected to the drive roll 19 1.
  • the tension of the second belt 109 is maintained in an appropriate state by adjusting the position of the tension roll 192.
  • Belt temperature controllers 193 are arranged on both sides of a part of the endless track of the belt 109.
  • the temperature of the second belt 109 is adjusted by heating or cooling. Preferred materials and manufacturing method of the second belt 109 are the same as those of the first belt 105.
  • the glass plate 104 is sandwiched between the belts 105 and 109 from both sides, and is conveyed in a pressed state. Therefore, it is possible to further improve the condition of the surface of the bent glass plate.
  • FIG. 22 is a cross-sectional view showing the vicinity of a bending region of another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • This device has the same configuration as the device shown in FIGS. 11 and 12 except for the part that presses the glass plate upward.
  • a second belt 109 is present on the bending member 110 below the glass transport path 141.
  • the lower bending member 110 presses the glass plate 104 against the upper bending member 106 via the first belt 105 and the second belt 109.
  • the upper bending member 106 presses the glass plate 104 against the lower bending member 110. Since the bending surface of the lower bending member 110 has a shape obtained by inverting the bending surface of the upper bending member 106, the two forming surfaces can be overlapped with each other.
  • the glass plate 4 has the belts 105 and 109 from both sides. And is transported in a pressed state. Therefore, similarly to the apparatus shown in FIG. 21, the surface condition of the bent glass sheet can be further improved.
  • both belts may be driven to convey the glass plate. May be used as a free drive, and only the other belt may be driven to convey the glass plate.
  • a bent glass plate having the same shape as that manufactured in the first embodiment of the manufacturing method was manufactured by exchanging the transport direction and the width direction. That is, a radius of curvature of 500 OmmR is provided in the transport direction of the glass plate, and a radius of curvature of 130 OmmR is provided in the width direction of the glass plate. Except for the bending member, an apparatus basically similar to the apparatus described in the first embodiment of the manufacturing method was used for the bending.
  • the radius of curvature R! As a result, the transfer path 141 in the quenching device drawn a gentle curve. As a result, the glass plate after cooling was obtained at an angle closer to horizontal and at a lower position. Therefore, subsequent handling became easier.
  • FIG. 23 is a cross-sectional view showing one embodiment of an apparatus for producing a bent glass sheet of the present invention.
  • this device includes a heating furnace 121, a bending device 122, and a quenching device (cooling device) 123, which share a common glass sheet transport path 144. have.
  • the temperature at which the glass sheet 124 can be formed in the heating furnace 122 for example, the temperature between the strain point and the softening point of the glass sheet). Degrees).
  • the glass sheet is bent in a bending device 122 and quenched in a quenching device 123 to be strengthened.
  • the transport path 1 4 3 is set to be substantially horizontal in the heating furnace 1 2 1, but has a substantially constant curvature in the quenching device 1 2 3 when viewed from the side of the quenching device. It is set to form a curve.
  • Such switching of the transport paths 144 is performed in the bending device 122. Specifically, the glass plate 124 is transported in a substantially horizontal direction from the heating furnace 122 to the bending device 122. Next, after the bending process in the bending device 122, the glass plate 124 is substantially fixed from the bending device 122 to the quenching device 122 according to the change in the shape of the glass plate. It is transported in a direction that draws a curved curve. The curvature of the transfer path 144 is set to substantially match the curvature of the bent glass plate 124a in the transfer direction so that the glass plate can be stably transferred.
  • a bending member 126 is disposed above the transport path 144.
  • a plurality of rolls 127 are arranged below the transport path 144.
  • the belt 125 is looped around a roll 127 to form an endless track.
  • at least one roll is connected to a roll driving device (not shown) so that the belt 105 can be driven at a peripheral speed required for conveying the glass sheet.
  • Rolls that are not connected to the driving device are preferably non-driving rolls (free rolls) that can rotate with a small external force.
  • the surface of the bending member facing the transport path 144 functions as a forming surface 160 for bending the glass plate.
  • the forming surface 160 is provided with a convex shape when viewed from the side of the quenching device in order to give the glass plate a predetermined radius of curvature in the transport direction.
  • molding surface 1 6 0 in order to provide a predetermined bent shape in the width direction of the glass plate (e.g. shape having a predetermined radius of curvature R 2), has a shape which is also bent in the width direction.
  • As the material of the bending member 126 various kinds of metals and ceramics can be used.
  • the bending member 1 2 6 is shown in Fig. 23. Although it may be integrated as shown, it may be formed by combining a plurality of divided members.
  • the bending member 126 is preferably provided with a heat sink so that the glass sheet in the initial stage of the continuous production is not adversely affected by the bending member 126 whose temperature has not been sufficiently raised.
  • the belt 125 is made of a heat-resistant material, and can be formed, for example, of a heat-resistant fiber such as a metal fiber, an inorganic fiber, a graphite fiber, and an aramide fiber.
  • the belt 125 is made of such heat-resistant fiber by plain weaving, twill weaving, knitting or the like, but is not limited thereto.
  • the heat-resistant material may be formed into a felt shape or a net shape to form a belt.
  • the roll 127 serves as a glass plate pressing member that lifts the glass plate 124 together with the belt 125 in the bending process and presses the glass plate against the forming surface 160 through the belt 125. I do.
  • the roll 1 2 7 of the bending device 1 2 2 facing the transport path 1 4 3 is used to receive the glass sheet 1 2 4 from the heating furnace 1 2 1 when the flat glass plate 1 2 4 is belted 1 2 5 Are arranged in a substantially horizontal row so that they can be supported via
  • the rolls 127 are formed on the surface of the glass sheet so that the belt 125 can press the entire surface of the glass sheet and stably support it.
  • the mouth 127 also functions as a belt support member.
  • a position adjusting mechanism (not shown) is connected to each roll 127, and the height of each mouth 127 is individually adjusted up and down. You can do it.
  • the heating furnace 122 a conventional heating furnace can be used. Although there is no particular limitation on the member that conveys the glass plate in the horizontal direction, a roll 181 is preferable from the viewpoint of heating efficiency and the like.
  • the quenching device 123 a device that has been conventionally used can be basically used. However, as shown in FIG. It is preferable to use a quenching device provided with a transfer path through which a glass sheet having a shape can be stably transferred. Next, an example of a bending process of a glass sheet in a bending area provided with the bending device 122 will be described with reference to FIGS.
  • the glass plate 124 is heated to a temperature at which it can be formed while being conveyed in the heating furnace 122 in the horizontal direction by the rolls 181. As shown in FIG. 24, the glass plate 124 is conveyed from the discharge port 182 of the heating furnace 122 to a predetermined molding position by the belt 125.
  • the belt 125 is lifted by the rolls 175, 176, 177, and the glass plate 124 is formed on the forming surface 160 of the bending member 126. Between the belt and the belt 125, pressed and bent. Thus, the shape of the molding surface 160 is transferred to the glass plate 124. In the embodiment shown in FIG. 25, it is preferable that the molding surface 160 be convex in the transport direction and have a substantially constant curvature. Of the rolls that push up the belt, the glass plate 1 2 4
  • the pressing roll 175 pressing against 160 is set so that the belt 125 can be pushed up to a position along the molding surface 160. Also, the end rolls 1 7 6,
  • the number of pressing rolls 175 may be appropriately determined depending on the desired shape of the bent glass sheet, but generally at least two are required.
  • the number of rolls 175 is preferably at least five.
  • the roll After bending, the roll descends while maintaining the convex arrangement, as shown in Figure 26. At this time, the bent glass sheet 124a is still in a high temperature state. However, since the belt 125 descends while maintaining the shape along the curved surface of the glass plate, the glass plate 124a can also descend while maintaining a stable posture.
  • the bent glass sheet 124 a is lowered to a position where the glass sheet can be transferred to the quenching device 123.
  • This position extends the arc drawn by the transport path 144 with a substantially constant curvature in the quench device 123. It is preferably a position. At this time, it is desired that the position of the rolls 77 among the rolls be particularly accurately controlled. From this position, the bent glass plate 124a is conveyed by the belt 125 along a curved surface having a constant curvature, and as shown in Fig. 27, the entrance between the partition plates 1336 is formed. After passing through, it is introduced into the quenching device 1 2 3.
  • the direction in which the glass sheet is transported from the bending position to the quenching device 1 23 is not the horizontal direction but the direction along the extension direction of the curved surface formed by the cross section of the glass sheet in the transport direction. .
  • the glass plate 124a can be carried into the quenching device 123 in a stable posture.
  • the glass plate is conveyed by rolls 135 and cooled rapidly by blowing cooling air from a cooling gas blowing nozzle (not shown). Also at this time, the glass plate 124a is conveyed along the direction in which the arc is extended. By quenching while transporting in this direction, the glass sheet is transported stably and cooled uniformly from the surface.
  • a bent glass plate having a curvature in two directions as shown in FIG. 20 could be manufactured continuously.
  • the roll 127 acts as the glass plate pressing member and the belt holding member.
  • the present invention is not limited thereto, and other forms are also possible.
  • a bending member may be prepared below the conveyance path, and the added bending member may be used as a glass plate pressing member and a belt holding member.
  • the upper bending member 126 may be lowered to press the glass plate.
  • the bending apparatus 122 shown in FIG. 28 and FIG. 29 is such a modified example, and in this case, the bending member 128 is used as a belt holding member.
  • the bending process is performed after the glass plate 124 is transported from the heating furnace 121 to the bending position by the belt 125. 1 7 8 moves upward to release the tension of the belt 10 5, and the upper bending member 12 6 descends to move the glass plate 12 4 into the upper bending member 12 6 and the lower bending member 1 It is performed by sandwiching between 28.
  • the bent glass plate 124a is conveyed to the quenching device 123 by inverting the upper bending member upward and moving the belt while being supported by the belt 125.
  • a roll for shaping the surface shape of the glass plate is not required, and the rolls are arranged along the surface shape of the glass plate in the bending process. Is unnecessary, and the apparatus and process can be simplified.
  • FIG. 30 is a cross-sectional view showing another embodiment of the apparatus for manufacturing a bent glass sheet of the present invention.
  • This apparatus has the same configuration as the apparatus shown in FIG. 23 except for the positional relationship between the bending apparatus 162 and the quenching apparatus 123.
  • this manufacturing apparatus is characterized in that the carry-in entrance (between the partition plates 13 and 16) of the quenching device is located lower than the carry-out exit 18 of the heating furnace.
  • the bent glass plate 124 a changes its posture before being conveyed to the quenching device 123.
  • Belt 125 supports the bent glass sheet along the curved surface of the glass sheet to convey the glass sheet to the quenching device while the glass sheet changes orientation.
  • the bent glass sheet 124 a is carried out to the quenching device 123 from a lower entrance than the position where the bent glass plate 124 was introduced into the bending device 162.
  • the belt 125 and the roll 127 move farther, the glass plate is lower after being quenched in the quenching device 123. Therefore, there is an advantage that the inclination of the glass sheet itself is closer to the horizontal direction than the apparatus shown in FIG. 23, and the glass sheet can be easily handled in the subsequent process.
  • the thickness of the glass plate that can be manufactured
  • a bent glass sheet having a thickness of 2.3 mm or more and 5 mm or less can be suitably manufactured. Further, the manufacturing methods of the above embodiments are more suitable for manufacturing a bent glass sheet having a thickness of 2.3 mm or more and 3 mm or less.
  • the bending method using a belt described above is also characterized in that a glass plate can be bent with high accuracy even if the plate thickness is relatively thin.
  • the bent glass sheet of the present invention can be efficiently manufactured by the following method.
  • the glass sheet is heated to a temperature at which the glass sheet can be formed in the heating furnace, and the glass sheet is unloaded from the heating furnace.
  • the glass sheet By pressing this glass sheet together with a belt made of a heat-resistant material against a bending member (forming mold), the glass sheet has a predetermined curvature in at least the glass transport direction in a glass transport direction and a direction orthogonal to this direction.
  • the glass sheet bent so as to have a shape can be formed by a method of cooling while further conveying the conveying path having the predetermined curvature.
  • the glass plate is carried out of the heating furnace in a predetermined direction (preferably in a horizontal direction).
  • the glass sheet is bent in a direction perpendicular to the glass sheet conveyance direction (direction traversing the conveyance path) as it progresses to the conveyance downstream side. It is preferable to add a bent shape while carrying the belt together with the bracket.
  • the belt is conveyed to a forming position by the belt while being supported by a belt made of a heat-resistant material, and the belt is pressed together with the belt against the forming surface of the bending member at the forming position.
  • the glass plate is formed into a shape bent in the conveying direction of the glass plate and a direction orthogonal to this direction while being bent, and the glass plate is supported by the belt bent in the bent shape. It is preferable that the belt is carried out from the molding position while maintaining the state.
  • the present invention it is possible to provide a bent glass sheet for a vehicle window that is accurately bent in “two directions”.
  • This glass plate is not cylindrical or spherical, but provides a smooth, continuous reflection image. If it is used for a door window, a simple mechanism ensures smooth opening and closing, and has a high degree of freedom in the direction of movement. In view of these effects, it is clear that the present invention has great utility in the technical field of vehicle window structures.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

L'invention concerne une plaque de verre cintrée avec précision dans deux directions et ayant une surface cintrée composée, produisant une image non-cylindrique, non-sphérique, uniforme et dont la réflexion est continue. Lorsque cette plaque est utilisée pour une vitre de portière, la facilité de l'ouverture et de la fermeture est assurée par un mécanisme simple, donnant ainsi un grand degré de liberté de mouvement. Cette forme ne peut être obtenue avec précision selon un procédé traditionnel d'estampage, elle peut en revanche être réalisée grâce à un procédé de courbure des plaques de verre dans lequel une courroie thermorésistante est utilisée.
PCT/JP2000/003626 1999-07-23 2000-06-02 Plaque de verre cintree pour vitres d'automobiles WO2001007373A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US10/031,958 US6749926B1 (en) 1999-07-23 2000-06-02 Curved glass sheet for vehicle window
AU51050/00A AU5105000A (en) 1999-07-23 2000-06-02 Curved glass sheet for vehicle window
JP2001512465A JP4087111B2 (ja) 1999-07-23 2000-06-02 車両窓用ガラス板
EP00935540A EP1209130A4 (fr) 1999-07-23 2000-06-02 Plaque de verre cintree pour vitres d'automobiles

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP20993399 1999-07-23
JP11/209933 1999-07-23

Publications (1)

Publication Number Publication Date
WO2001007373A1 true WO2001007373A1 (fr) 2001-02-01

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PCT/JP2000/003626 WO2001007373A1 (fr) 1999-07-23 2000-06-02 Plaque de verre cintree pour vitres d'automobiles

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US (1) US6749926B1 (fr)
EP (1) EP1209130A4 (fr)
JP (1) JP4087111B2 (fr)
AU (1) AU5105000A (fr)
MY (1) MY126647A (fr)
WO (1) WO2001007373A1 (fr)

Cited By (4)

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WO2016136758A1 (fr) * 2015-02-25 2016-09-01 旭硝子株式会社 Verre de revêtement incurvé et son procédé de fabrication, et élément en verre, dispositif d'affichage et verre incurvé
WO2018199402A1 (fr) * 2017-04-24 2018-11-01 엘지전자 주식회사 Procédé de fabrication de verre incurvé
JP2021512842A (ja) * 2018-02-09 2021-05-20 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ 曲げられたガラス板またはガラスセラミック板およびその製造方法

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AU2003237639A1 (en) * 2002-06-17 2003-12-31 Nippon Sheet Glass Co., Ltd. Apparatus and method for producing a glass sheet bent in two directions
JP2004075504A (ja) * 2002-08-22 2004-03-11 Nippon Sheet Glass Co Ltd 板ガラスの複曲成形方法及びその装置
US8051681B2 (en) * 2007-05-09 2011-11-08 Corning Incorporated Constant force scoring device and method for using same
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FI119511B (fi) * 2007-06-18 2008-12-15 Glaston Services Ltd Oy Menetelmä ja laite lasilevyn taivuttamiseksi ja karkaisemiseksi
FR2945985B1 (fr) * 2009-05-27 2011-05-20 Saint Gobain Vitrage a faible niveau de double image.
JP2011026169A (ja) * 2009-07-24 2011-02-10 Nippon Sheet Glass Co Ltd 単一方向曲げガラスの製造装置、単一方向曲げガラス及び単一方向曲げガラスの製造方法
WO2011142814A1 (fr) * 2010-05-12 2011-11-17 Pilkington Group Limited Procédé de façonnage de feuilles de verre
US8817356B2 (en) * 2010-10-25 2014-08-26 Gentex Corporation Vehicular rearview mirror with increased field-of-view
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EA027316B1 (ru) * 2010-12-13 2017-07-31 Сэн-Гобэн Гласс Франс Остекление транспортного средства (варианты)
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JP6545372B2 (ja) 2015-11-25 2019-07-17 サン−ゴバン グラス フランスＳａｉｎｔ−Ｇｏｂａｉｎ Ｇｌａｓｓ Ｆｒａｎｃｅ 正圧アシスト式の重力曲げ法およびこの方法に適した装置
US11247931B2 (en) 2016-01-28 2022-02-15 Saint-Gobain Glass France Positive pressure-supported glass bending method and device suitable therefor
DE102017008610A1 (de) * 2016-09-14 2018-03-15 Asahi Glass Company, Limited Verfahren zur Herstellung eines gebogenen Glasgegenstands und gebogener Glasgegenstand
US10981357B2 (en) * 2018-05-31 2021-04-20 Agc Automotive Americas Co. Glass article
US20230060365A1 (en) * 2021-08-24 2023-03-02 Apple Inc. Windows With Uniform Thicknesses

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123246A (en) 1978-01-26 1978-10-31 Ppg Industries, Inc. Shaping and quenching glass sheets by roll forming using transition quench rolls
JPS6448315U (fr) * 1987-09-21 1989-03-24
US4983205A (en) * 1989-03-16 1991-01-08 Saint-Gobain Vitrage International Apparatus for bending glass plates
JPH03174334A (ja) 1989-08-14 1991-07-29 Saint Gobain Vitrage Internatl 反りガラス板を製造する機械及び方法
EP0477913A2 (fr) * 1990-09-26 1992-04-01 Asahi Glass Company Ltd. Procédé et dispositif de bombage de verres plats
JPH059037A (ja) 1990-09-26 1993-01-19 Asahi Glass Co Ltd ガラス板の曲げ成形方法およびその装置
JPH11500796A (ja) 1995-02-14 1999-01-19 ブローゼ ファールツォイクタイレ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 車両ドア内を降下可能な球面状に湾曲されたウィンド板ガラス用の板ガラスガイド

Family Cites Families (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1112781A (en) 1961-09-22 1968-05-08 Pittsburgh Plate Glass Co Method and apparatus for bending a glass sheet
NO116133B (fr) 1964-03-13 1969-02-03 Ppg Industries Inc
ES314077A1 (es) 1964-06-30 1966-03-01 Pittsburgh Plate Glass Co Un metodo para curvar una lamina de vidrio.
FR1476785A (fr) 1966-03-01 1967-04-14 Saint Gobain Perfectionnement au bombage de plaques de matières à l'état plastique
FR2137143B1 (fr) 1971-05-14 1974-03-08 Saint Gobain Pont A Mousson
JPS51141123A (en) 1975-05-29 1976-12-04 Nissan Motor Co Ltd Guide device for raising and lowering window glass
US4139359A (en) 1977-11-02 1979-02-13 Ppg Industries, Inc. Method and apparatus for shaping glass sheets by roll forming
FR2442219A1 (fr) 1978-11-27 1980-06-20 Saint Gobain Bombage de feuilles de verre
US4318728A (en) 1979-08-27 1982-03-09 Ppg Industries, Inc. Double link arrangement for press bending molds and method of press shaping glass sheets
FR2549465B1 (fr) 1983-07-20 1985-09-20 Saint Gobain Vitrage Installation de bombage et de trempe de feuilles de verre
FR2549493B1 (fr) 1983-07-21 1987-07-31 Cegedur Procede d'obtention a partir de poudre d'alliage d'aluminium a haute resistance de demi-produits files
US4615931A (en) * 1984-02-22 1986-10-07 Central Glass Company, Limited Shaped glass panel for automobile rear window or rear door
US4666496A (en) 1985-12-06 1987-05-19 Ppg Industries, Inc. Shuttling support frame for vacuum pickup
FI862766A (fi) 1986-06-30 1987-12-31 Safematic Ltd Oy Transportband.
FR2604992B1 (fr) 1986-10-01 1988-12-02 Saint Gobain Vitrage Bombage et trempe de plaques de verre defilant sur un lit de conformation courbe dans la direction de defilement
JPS6448315A (en) 1987-08-14 1989-02-22 Hitachi Metals Ltd High temperature superconductor
IT1213910B (it) 1987-10-09 1990-01-05 F I R I E Di Giorgio Sansone S Nastro trasportatore e o accompagnatore a bordi nervati per la guida su cilindri di rinvio e trascinamento
US4899872A (en) 1988-03-24 1990-02-13 Honda Sangyo Co., Ltd. Anti-weaving conveyor belt
FR2632297B1 (fr) 1988-06-07 1990-08-10 Saint Gobain Vitrage Recuperation et trempe simultanee des plaques de verre a la sortie d'une installation de bombage et de trempe a lit de conformation courbe dans la direction de defilement des plaques de verre
US4904294A (en) 1988-12-22 1990-02-27 Ppg Industries, Inc. Belt assisted press bending
US4969966A (en) * 1989-06-26 1990-11-13 Water Bonnet Manufacturing, Inc. Method of producing curved laminated glass panels
DE3928968C1 (fr) 1989-09-01 1991-01-17 Vegla Vereinigte Glaswerke Gmbh, 5100 Aachen, De
DE4104086C1 (fr) 1991-02-11 1992-02-20 Vegla Vereinigte Glaswerke Gmbh, 5100 Aachen, De
DE4132652C2 (de) 1991-10-01 1995-04-27 Flachglas Ag Verfahren zur Herstellung einer einfachgekrümmten oder einer doppeltgekrümmten Verbundglasscheibe, insbesondere für Kraftfahrzeuge
US5286542A (en) 1992-06-16 1994-02-15 Advanced Belt Technology Welded non-woven endless belt
US5264058A (en) 1992-08-24 1993-11-23 Monsanto Forming a shaped prelaminate and bilayer glazing of glass and plastic
JP3541415B2 (ja) 1994-02-25 2004-07-14 旭硝子株式会社 ガラス板の曲げ方法および曲げ装置
JP3968538B2 (ja) 1996-11-21 2007-08-29 旭硝子株式会社 ガラス板の曲げ成形方法および装置
JPH11147728A (ja) 1997-08-06 1999-06-02 Asahi Glass Co Ltd ガラス板の曲げ成形方法および装置
TW546261B (en) 1997-11-06 2003-08-11 Nippon Sheet Glass Co Ltd Method and apparatus for producing bent glass sheet

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4123246A (en) 1978-01-26 1978-10-31 Ppg Industries, Inc. Shaping and quenching glass sheets by roll forming using transition quench rolls
JPS6448315U (fr) * 1987-09-21 1989-03-24
US4983205A (en) * 1989-03-16 1991-01-08 Saint-Gobain Vitrage International Apparatus for bending glass plates
JPH03174334A (ja) 1989-08-14 1991-07-29 Saint Gobain Vitrage Internatl 反りガラス板を製造する機械及び方法
EP0477913A2 (fr) * 1990-09-26 1992-04-01 Asahi Glass Company Ltd. Procédé et dispositif de bombage de verres plats
JPH059037A (ja) 1990-09-26 1993-01-19 Asahi Glass Co Ltd ガラス板の曲げ成形方法およびその装置
JPH11500796A (ja) 1995-02-14 1999-01-19 ブローゼ ファールツォイクタイレ ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディートゲゼルシャフト 車両ドア内を降下可能な球面状に湾曲されたウィンド板ガラス用の板ガラスガイド

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1209130A4

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2839019A1 (fr) * 2002-04-29 2003-10-31 Wagon Automotive Snc Procede de fabrication d'un dispositif d'obturation comprenant deux galbes, procede d'obturation et vehicules correspondants
WO2016136758A1 (fr) * 2015-02-25 2016-09-01 旭硝子株式会社 Verre de revêtement incurvé et son procédé de fabrication, et élément en verre, dispositif d'affichage et verre incurvé
JPWO2016136758A1 (ja) * 2015-02-25 2018-01-11 旭硝子株式会社 曲面カバーガラス及びその製造方法、並びに、ガラス部材、表示装置、曲面ガラス
CN112047624A (zh) * 2015-02-25 2020-12-08 Ａｇｃ株式会社 显示装置及其用的曲面玻璃、曲面罩盖玻璃及其制造方法、以及玻璃构件
TWI725013B (zh) 2015-02-25 2021-04-21 日商Ａｇｃ股份有限公司 顯示裝置用之曲面覆蓋玻璃及其製造方法、以及玻璃構件、顯示裝置、顯示裝置用之曲面玻璃
US11198634B2 (en) 2015-02-25 2021-12-14 AGC Inc. Curved cover glass and method for manufacturing same, and glass member, display device, and curved glass
CN112047624B (zh) * 2015-02-25 2022-09-23 Ａｇｃ株式会社 显示装置及其用的曲面玻璃、曲面罩盖玻璃及其制造方法、以及玻璃构件
WO2018199402A1 (fr) * 2017-04-24 2018-11-01 엘지전자 주식회사 Procédé de fabrication de verre incurvé
US11584674B2 (en) 2017-04-24 2023-02-21 Lg Electronics Inc. Curved glass manufacturing method
JP2021512842A (ja) * 2018-02-09 2021-05-20 ショット アクチエンゲゼルシャフトＳｃｈｏｔｔ ＡＧ 曲げられたガラス板またはガラスセラミック板およびその製造方法
JP7379349B2 (ja) 2018-02-09 2023-11-14 ショット アクチエンゲゼルシャフト 曲げられたガラス板またはガラスセラミック板およびその製造方法

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EP1209130A1 (fr) 2002-05-29
US6749926B1 (en) 2004-06-15
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JP4087111B2 (ja) 2008-05-21
MY126647A (en) 2006-10-31
AU5105000A (en) 2001-02-13

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